Evaluation: Parent ID to run traces

[AkhileshNegi]

Is your feature request related to a problem?

When evaluation runs, results appear as individual traces with different trace_ids. So when duplication_factor is set (e.g., 5),
each repeated question gets a unique trace_id with no way to collate them at the question level.

Describe the solution you'd like

Introduce a parent ID (e.g., question_id) for repeated questions. While each trace retains its unique trace_id, the parent ID links all repetitions of the same question together.

Benefits

• UI can group repeated questions for easier comparison
• Export functionality can aggregate results by question